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出于安全原因,管理员需要配置服务器以限制到某应用程序服务器的邮件流量。以下哪项技术可用于管理这一操作?()
A、PAT(PortAddress Translation)
B、ACLs
C、子网掩码
D、端口堵塞
正确答案:
B
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